Method and apparatus for improved mixing of solid, liquid, or gaseous materials and combinations thereof

Patent metadata

Field	Value
Publication number	US-9839884-B2
Application number	US-201314029299-A
Country	US
Kind code	B2
Filing date	Sep 17, 2013
Priority date	Sep 18, 2012
Publication date	Dec 12, 2017
Grant date	Dec 12, 2017

Abstract

Mixer apparatus configured to mix the contents of a vessel without the formation of a vortex are provided. The mixer apparatus can include a rotational mechanism; a gearbox attached to the rotational mechanism; a first shaft attached to the gearbox; a second shaft attached to the gearbox; a first rotor configured to be rotated by the first shaft; and a second rotor configured to be rotated by the second shaft. The first shaft can be coaxial with the second shaft, and the gearbox can be configured to rotate the first shaft and the second shaft in opposite directions. The first rotor and the second rotor are configured to be rotated in opposite directions.

First claim

What is claimed:

1. A mixer apparatus configured to mix the contents of a vessel without the formation of a vortex, the mixer apparatus comprising:
a rotational mechanism;
a gearbox attached to the rotational mechanism;
a first shaft attached to the gearbox;
a second shaft attached to the gearbox, wherein the first shaft is coaxial with the second shaft, and wherein the gearbox is configured to rotate the first shaft and the second shaft in opposite directions;
a first rotor configured to be rotated by the first shaft, wherein the first rotor comprises a plurality of first rotor blades; and
a second rotor configured to be rotated by the second shaft, wherein the second rotor comprises a plurality of second rotor blades, and wherein the first rotor and the plurality of first rotor blades and the second rotor and the plurality of second rotor blades form an opposing toroidal flow without the formation of a vortex in the vessel,
wherein a distance between the first rotor and the second rotor is less than an average length of the plurality of first rotor blades and the plurality of second rotor blades, the distance between the first rotor and the second rotor adjustable from ten percent to fifty percent of the average length of the plurality of first rotor blades and the plurality of second rotor blades.

2. The mixer apparatus as in claim 1 , wherein the rotational mechanism is a motor.

3. The mixer apparatus as in claim 1 , wherein the rotational mechanism is a push-operated mechanism.

4. The mixer apparatus as in claim 3 , wherein the push-operated mechanism comprises a handle shaft within a housing such that insertion of the handle shaft into the housing causes an internal screw mechanism to rotate, and wherein the internal screw mechanism is attached to the gearbox, the push-operated mechanism further comprising a return spring coupled to the handle shaft.

5. The mixer apparatus as in claim 1 , wherein the first rotor is configured to direct the contents of the vessel toward the second rotor, and wherein the second rotor is configured to direct the contents of the vessel toward the first rotor.

6. The mixer apparatus as in claim 1 , wherein the first rotor is configured to direct the contents of the vessel away from the second rotor, and wherein the second rotor is configured to direct the contents of the vessel away from the first rotor.

7. The mixer apparatus as in claim 1 , wherein the vessel defines a smooth inner surface.

8. The mixer apparatus as in claim 1 , wherein the vessel is free from a baffle.

9. The mixer apparatus as in claim 1 , wherein the mixer apparatus is free from a scraper.

10. The mixer apparatus as in claim 1 , wherein the first rotor blades are angled in a first direction.

11. The mixer apparatus as in claim 1 , wherein the second rotor blades are angled in a second direction.

12. The mixer apparatus as in claim 1 , further comprising an extension mounted to the first shaft or the second shaft, the extension positioned below the first and second rotors such that the extension blocks the first and second rotors from contacting a bottom surface of the vessel, wherein the first shaft defines a hollow center, and wherein the second shaft is located within the hollow center defined by the first shaft and is independently rotatable therein.

13. The mixer apparatus as in claim 1 , wherein the first rotor and the second rotor counter-rotate in a manner that substantially eliminates torque applied to the contents.

14. The mixer apparatus as in claim 1 , wherein the first rotor is rotated at substantially the same speed, but in an opposite direction, as the second rotor.

15. A mixer apparatus configured to mix the contents of a vessel without the formation of a vortex, the mixer apparatus comprising:
a rotational mechanism;
a first gearbox attached to the rotational mechanism;
a second gearbox attached to the rotational mechanism;
a first shaft attached to the first gearbox;
a second shaft attached to the second gearbox, wherein the first shaft is coaxial with the second shaft;
a first rotor configured to be rotated by the first shaft, wherein the first rotor comprises a plurality of first rotor blades; and
a second rotor configured to be rotated by the second shaft, wherein the second rotor comprises a plurality of second rotor blades, and wherein the first rotor and the plurality of first rotor blades and the second rotor and the plurality of second rotor blades form an opposing toroidal flow without the formation of a vortex in the vessel,
wherein a distance between the first rotor and the second rotor is less than an average length of the plurality of first rotor blades and the plurality of second rotor blades, the distance between the first rotor and the second rotor adjustable from ten percent to fifty percent of the average length of the plurality of first rotor blades and the plurality of second rotor blades.

16. The mixer apparatus as in claim 15 , wherein the vessel defines a smooth inner surface, and wherein the vessel is free from a baffle.

17. The mixer apparatus as in claim 15 , wherein the mixer apparatus is free from a scraper.

18. The mixer apparatus as in claim 1 , wherein the first rotor and the second rotor are configured to be rotated in opposite directions.

19. The mixer apparatus as in claim 1 , wherein the first rotor and the second rotor are configured to be rotated in the same direction.

20. The mixer apparatus as in claim 15 , wherein the first rotor and the second rotor are configured to be rotated in opposite directions.

21. The mixer apparatus as in claim 15 , wherein the first rotor and the second rotor are configured to be rotated in the same direction.

22. The mixer apparatus as in claim 15 , wherein the first rotor is configured to direct the contents of the vessel toward the second rotor, and wherein the second rotor is configured to direct the contents of the vessel toward the first rotor.

23. The mixer apparatus as in claim 15 , wherein the first rotor is configured to direct the contents of the vessel away from the second rotor, and wherein the second rotor is configured to direct the contents of the vessel away from the first rotor.

Assignees

• Regalbuto John R
• Regalbuto John Anthony
• Univ South Carolina

Inventors

• Regalbuto John R
• Regalbuto John Anthony

Classifications

• B01F15/00506

  Operations & Transport · mapped topic

• B01F7/22

  Operations & Transport · mapped topic

• B01F7/166

  Operations & Transport · mapped topic

• B01F7/00191 Primary

  Operations & Transport · mapped topic

• B01F27/84 Primary

  with two or more stirrers rotating at different speeds or in opposite directions about the same axis · CPC title